Abstract
The development of an EFD (Experimental Fluid Dynamics)/CFD-integrated system for upgrading large-scale wind tunnels, called Digital/Analog-Hybrid Wind Tunnel, is presented. The aim of the system is to improve efficiency, accuracy, and reliability of aerodynamic characteristics evaluation in aerospace vehicle developments through mutual support between EFD and CFD. The function of the system consists of optimization of test planning utilizing pretest-CFD calculations, an accurate correction of the wind tunnel wall and support interaction effects through CFD, CFD data refinement based on EFD data, the most probable aerodynamic characteristics estimation based on both EFD and CFD data, database including EFD and CFD data for an identical condition, and so forth. In the system development, the EFD/CFD integration is the most important technology. Needs and technical challenges in the EFD/CFD integration are addressed.
